There needs to be a way to make oneself available for assistance calls and then log off of the system when it's not convenient to help. (pressthebuttons.com)
And whenever you feel like a taking a break from the course, just log off at your leisure — your progress is automatically saved! (digitaldriving.com)
Other guidelines you can set for yourself: checking and answering email for only 30 minutes a day before logging off. (health.com)